Add custom_details and custom_activity_details as first routes

how this works: we use find_by_host() to find the Host in question, the
defer to the existing function!

Caveat: Currently, we, in that function, we do another lookup DB lookup
for the Blog, even thou we already know it.
It might be wise, to have both of those another wrapper here?!

src/main.rs

@@ -197,6 +197,13 @@ Then try to restart Plume
     });
 
     let rocket = rocket::custom(CONFIG.rocket.clone().unwrap())
+        .mount(
+            "/custom_domains/",
+            routes![
+                routes::blogs::custom_details,
+                routes::blogs::custom_activity_details,
+            ],
+        )
         .mount(
             "/",
             routes![

src/routes/blogs.rs

@@ -19,6 +19,16 @@ use plume_models::{
 use routes::{errors::ErrorPage, Page, RespondOrRedirect};
 use template_utils::{IntoContext, Ructe};
 
+#[get("/<custom_domain>?<page>", rank = 2)]
+pub fn custom_details(
+    custom_domain: String,
+    page: Option<Page>,
+    rockets: PlumeRocket,
+) -> Result<Ructe, ErrorPage> {
+    let blog = Blog::find_by_host(&rockets, Host::new(custom_domain))?;
+    details(blog.fqn, page, rockets)
+}
+
 #[get("/~/<name>?<page>", rank = 2)]
 pub fn details(name: String, page: Option<Page>, rockets: PlumeRocket) -> Result<Ructe, ErrorPage> {
     let page = page.unwrap_or_default();
@@ -38,6 +48,16 @@ pub fn details(name: String, page: Option<Page>, rockets: PlumeRocket) -> Result
     )))
 }
 
+#[get("/<custom_domain>", rank = 1)]
+pub fn custom_activity_details(
+    custom_domain: String,
+    rockets: PlumeRocket,
+    _ap: ApRequest,
+) -> Option<ActivityStream<CustomGroup>> {
+    let blog = Blog::find_by_host(&rockets, Host::new(custom_domain)).ok()?;
+    activity_details(blog.fqn, rockets, _ap)
+}
+
 #[get("/~/<name>", rank = 1)]
 pub fn activity_details(
     name: String,